3.6 General data
3.6.1 Overload characteristic (OL)
All COMBIVERT S6 can be operated time-limited at rated switching fre-
quency even in overload.Further information can be found in the diagrams
„Figure 6: Switch-o time t depending on the overload I / IN (OL) 400 V devices“ and
„Figure 7: Switch-o time t depending on the overload I / IN (OL) 230 V devices“.
Restrictions:
• The thermal design of the heat sink is based on the rated current and the maximum
permissible ambient temperature. At high ambient temperatures and/or high heat
sink temperatures (for example, by preceding utilization nearby 100%), the drive
controller can change to overtemperature error before triggering the protective func-
tion OL.
• At low output frequencies or switching frequencies higher than the rated switching
frequency, the maximum current (I0Hz/I6Hz) can be exceeded before and the error
OL2 can be triggered (see also chapter "Maximum current (OL2)“).
On exceeding a load of 105% the overload integrator starts. When falling below the in-
tegrator counts backwards. If the integrator achieves the overload characteristic, "Error!
Overload“ is triggered.
After a cooling period the message "no ERROR overload“ is displayed. The error can be
reset now. The drive controller must remain switched on during the cooling down phase.
40
GENERAL DATA
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